25687766100 has 36 divisors (see below), whose sum is σ = 74323270784. Its totient is φ = 6850070880.

The previous prime is 25687766051. The next prime is 25687766101. The reversal of 25687766100 is 166778652.

It is a super-2 number, since 2×25687766100² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25687766100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25687766101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42812644 + ... + 42813243.

Almost surely, 2^25687766100 is an apocalyptic number.

25687766100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25687766100 is an abundant number, since it is smaller than the sum of its proper divisors (48635504684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25687766100 is a wasteful number, since it uses less digits than its factorization.

25687766100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85625904 (or 85625897 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 25687766100 in words is "twenty-five billion, six hundred eighty-seven million, seven hundred sixty-six thousand, one hundred".